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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 | /* * Copyright (c) 2012 Qualcomm Atheros, Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "ath9k.h" /* * AR9285 * ====== * * EEPROM has 2 4-bit fields containing the card configuration. * * antdiv_ctl1: * ------------ * bb_enable_ant_div_lnadiv : 1 * bb_ant_div_alt_gaintb : 1 * bb_ant_div_main_gaintb : 1 * bb_enable_ant_fast_div : 1 * * antdiv_ctl2: * ----------- * bb_ant_div_alt_lnaconf : 2 * bb_ant_div_main_lnaconf : 2 * * The EEPROM bits are used as follows: * ------------------------------------ * * bb_enable_ant_div_lnadiv - Enable LNA path rx antenna diversity/combining. * Set in AR_PHY_MULTICHAIN_GAIN_CTL. * * bb_ant_div_[alt/main]_gaintb - 0 -> Antenna config Alt/Main uses gaintable 0 * 1 -> Antenna config Alt/Main uses gaintable 1 * Set in AR_PHY_MULTICHAIN_GAIN_CTL. * * bb_enable_ant_fast_div - Enable fast antenna diversity. * Set in AR_PHY_CCK_DETECT. * * bb_ant_div_[alt/main]_lnaconf - Alt/Main LNA diversity/combining input config. * Set in AR_PHY_MULTICHAIN_GAIN_CTL. * 10=LNA1 * 01=LNA2 * 11=LNA1+LNA2 * 00=LNA1-LNA2 * * AR9485 / AR9565 / AR9331 * ======================== * * The same bits are present in the EEPROM, but the location in the * EEPROM is different (ant_div_control in ar9300_BaseExtension_1). * * ant_div_alt_lnaconf ==> bit 0~1 * ant_div_main_lnaconf ==> bit 2~3 * ant_div_alt_gaintb ==> bit 4 * ant_div_main_gaintb ==> bit 5 * enable_ant_div_lnadiv ==> bit 6 * enable_ant_fast_div ==> bit 7 */ static inline bool ath_is_alt_ant_ratio_better(struct ath_ant_comb *antcomb, int alt_ratio, int maxdelta, int mindelta, int main_rssi_avg, int alt_rssi_avg, int pkt_count) { if (pkt_count <= 50) return false; if (alt_rssi_avg > main_rssi_avg + mindelta) return true; if (alt_ratio >= antcomb->ant_ratio2 && alt_rssi_avg >= antcomb->low_rssi_thresh && (alt_rssi_avg > main_rssi_avg + maxdelta)) return true; return false; } static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf *conf, struct ath_ant_comb *antcomb, int alt_ratio, int alt_rssi_avg, int main_rssi_avg) { bool result, set1, set2; result = set1 = set2 = false; if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2 && conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA1) set1 = true; if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA1 && conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA2) set2 = true; switch (conf->div_group) { case 0: if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) result = true; break; case 1: case 2: if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh) break; if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 5))) || (set2 && (alt_rssi_avg >= (main_rssi_avg - 2))) || (alt_ratio > antcomb->ant_ratio)) result = true; break; case 3: if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh) break; if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 3))) || (set2 && (alt_rssi_avg >= (main_rssi_avg + 3))) || (alt_ratio > antcomb->ant_ratio)) result = true; break; } return result; } static void ath_lnaconf_alt_good_scan(struct ath_ant_comb *antcomb, struct ath_hw_antcomb_conf ant_conf, int main_rssi_avg) { antcomb->quick_scan_cnt = 0; if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA2) antcomb->rssi_lna2 = main_rssi_avg; else if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA1) antcomb->rssi_lna1 = main_rssi_avg; switch ((ant_conf.main_lna_conf << 4) | ant_conf.alt_lna_conf) { case 0x10: /* LNA2 A-B */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; break; case 0x20: /* LNA1 A-B */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; break; case 0x21: /* LNA1 LNA2 */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA2; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; break; case 0x12: /* LNA2 LNA1 */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; break; case 0x13: /* LNA2 A+B */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; break; case 0x23: /* LNA1 A+B */ antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; antcomb->first_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; break; default: break; } } static void ath_ant_set_alt_ratio(struct ath_ant_comb *antcomb, struct ath_hw_antcomb_conf *conf) { /* set alt to the conf with maximun ratio */ if (antcomb->first_ratio && antcomb->second_ratio) { if (antcomb->rssi_second > antcomb->rssi_third) { /* first alt*/ if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) /* Set alt LNA1 or LNA2*/ if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; else /* Set alt to A+B or A-B */ conf->alt_lna_conf = antcomb->first_quick_scan_conf; } else if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) { /* Set alt LNA1 or LNA2 */ if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; } else { /* Set alt to A+B or A-B */ conf->alt_lna_conf = antcomb->second_quick_scan_conf; } } else if (antcomb->first_ratio) { /* first alt */ if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) /* Set alt LNA1 or LNA2 */ if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; else /* Set alt to A+B or A-B */ conf->alt_lna_conf = antcomb->first_quick_scan_conf; } else if (antcomb->second_ratio) { /* second alt */ if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) /* Set alt LNA1 or LNA2 */ if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; else /* Set alt to A+B or A-B */ conf->alt_lna_conf = antcomb->second_quick_scan_conf; } else { /* main is largest */ if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) || (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2)) /* Set alt LNA1 or LNA2 */ if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; else /* Set alt to A+B or A-B */ conf->alt_lna_conf = antcomb->main_conf; } } static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, struct ath_hw_antcomb_conf *div_ant_conf, int main_rssi_avg, int alt_rssi_avg, int alt_ratio) { /* alt_good */ switch (antcomb->quick_scan_cnt) { case 0: /* set alt to main, and alt to first conf */ div_ant_conf->main_lna_conf = antcomb->main_conf; div_ant_conf->alt_lna_conf = antcomb->first_quick_scan_conf; break; case 1: /* set alt to main, and alt to first conf */ div_ant_conf->main_lna_conf = antcomb->main_conf; div_ant_conf->alt_lna_conf = antcomb->second_quick_scan_conf; antcomb->rssi_first = main_rssi_avg; antcomb->rssi_second = alt_rssi_avg; if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { /* main is LNA1 */ if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_HI, ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->first_ratio = true; else antcomb->first_ratio = false; } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_MID, ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->first_ratio = true; else antcomb->first_ratio = false; } else { if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_HI, 0, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->first_ratio = true; else antcomb->first_ratio = false; } break; case 2: antcomb->alt_good = false; antcomb->scan_not_start = false; antcomb->scan = false; antcomb->rssi_first = main_rssi_avg; antcomb->rssi_third = alt_rssi_avg; switch(antcomb->second_quick_scan_conf) { case ATH_ANT_DIV_COMB_LNA1: antcomb->rssi_lna1 = alt_rssi_avg; break; case ATH_ANT_DIV_COMB_LNA2: antcomb->rssi_lna2 = alt_rssi_avg; break; case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2: if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) antcomb->rssi_lna2 = main_rssi_avg; else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) antcomb->rssi_lna1 = main_rssi_avg; break; default: break; } if (antcomb->rssi_lna2 > antcomb->rssi_lna1 + div_ant_conf->lna1_lna2_switch_delta) div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; else div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_HI, ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->second_ratio = true; else antcomb->second_ratio = false; } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_MID, ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->second_ratio = true; else antcomb->second_ratio = false; } else { if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, ATH_ANT_DIV_COMB_LNA1_DELTA_HI, 0, main_rssi_avg, alt_rssi_avg, antcomb->total_pkt_count)) antcomb->second_ratio = true; else antcomb->second_ratio = false; } ath_ant_set_alt_ratio(antcomb, div_ant_conf); break; default: break; } } static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, struct ath_ant_comb *antcomb, int alt_ratio) { ant_conf->main_gaintb = 0; ant_conf->alt_gaintb = 0; if (ant_conf->div_group == 0) { /* Adjust the fast_div_bias based on main and alt lna conf */ switch ((ant_conf->main_lna_conf << 4) | ant_conf->alt_lna_conf) { case 0x01: /* A-B LNA2 */ ant_conf->fast_div_bias = 0x3b; break; case 0x02: /* A-B LNA1 */ ant_conf->fast_div_bias = 0x3d; break; case 0x03: /* A-B A+B */ ant_conf->fast_div_bias = 0x1; break; case 0x10: /* LNA2 A-B */ ant_conf->fast_div_bias = 0x7; break; case 0x12: /* LNA2 LNA1 */ ant_conf->fast_div_bias = 0x2; break; case 0x13: /* LNA2 A+B */ ant_conf->fast_div_bias = 0x7; break; case 0x20: /* LNA1 A-B */ ant_conf->fast_div_bias = 0x6; break; case 0x21: /* LNA1 LNA2 */ ant_conf->fast_div_bias = 0x0; break; case 0x23: /* LNA1 A+B */ ant_conf->fast_div_bias = 0x6; break; case 0x30: /* A+B A-B */ ant_conf->fast_div_bias = 0x1; break; case 0x31: /* A+B LNA2 */ ant_conf->fast_div_bias = 0x3b; break; case 0x32: /* A+B LNA1 */ ant_conf->fast_div_bias = 0x3d; break; default: break; } } else if (ant_conf->div_group == 1) { /* Adjust the fast_div_bias based on main and alt_lna_conf */ switch ((ant_conf->main_lna_conf << 4) | ant_conf->alt_lna_conf) { case 0x01: /* A-B LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x02: /* A-B LNA1 */ ant_conf->fast_div_bias = 0x1; break; case 0x03: /* A-B A+B */ ant_conf->fast_div_bias = 0x1; break; case 0x10: /* LNA2 A-B */ if (!(antcomb->scan) && (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) ant_conf->fast_div_bias = 0x3f; else ant_conf->fast_div_bias = 0x1; break; case 0x12: /* LNA2 LNA1 */ ant_conf->fast_div_bias = 0x1; break; case 0x13: /* LNA2 A+B */ if (!(antcomb->scan) && (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) ant_conf->fast_div_bias = 0x3f; else ant_conf->fast_div_bias = 0x1; break; case 0x20: /* LNA1 A-B */ if (!(antcomb->scan) && (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) ant_conf->fast_div_bias = 0x3f; else ant_conf->fast_div_bias = 0x1; break; case 0x21: /* LNA1 LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x23: /* LNA1 A+B */ if (!(antcomb->scan) && (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) ant_conf->fast_div_bias = 0x3f; else ant_conf->fast_div_bias = 0x1; break; case 0x30: /* A+B A-B */ ant_conf->fast_div_bias = 0x1; break; case 0x31: /* A+B LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x32: /* A+B LNA1 */ ant_conf->fast_div_bias = 0x1; break; default: break; } } else if (ant_conf->div_group == 2) { /* Adjust the fast_div_bias based on main and alt_lna_conf */ switch ((ant_conf->main_lna_conf << 4) | ant_conf->alt_lna_conf) { case 0x01: /* A-B LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x02: /* A-B LNA1 */ ant_conf->fast_div_bias = 0x1; break; case 0x03: /* A-B A+B */ ant_conf->fast_div_bias = 0x1; break; case 0x10: /* LNA2 A-B */ if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; break; case 0x12: /* LNA2 LNA1 */ ant_conf->fast_div_bias = 0x1; break; case 0x13: /* LNA2 A+B */ if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; break; case 0x20: /* LNA1 A-B */ if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; break; case 0x21: /* LNA1 LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x23: /* LNA1 A+B */ if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; break; case 0x30: /* A+B A-B */ ant_conf->fast_div_bias = 0x1; break; case 0x31: /* A+B LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x32: /* A+B LNA1 */ ant_conf->fast_div_bias = 0x1; break; default: break; } if (antcomb->fast_div_bias) ant_conf->fast_div_bias = antcomb->fast_div_bias; } else if (ant_conf->div_group == 3) { switch ((ant_conf->main_lna_conf << 4) | ant_conf->alt_lna_conf) { case 0x01: /* A-B LNA2 */ ant_conf->fast_div_bias = 0x1; break; case 0x02: /* A-B LNA1 */ ant_conf->fast_div_bias = 0x39; break; case 0x03: /* A-B A+B */ ant_conf->fast_div_bias = 0x1; break; case 0x10: /* LNA2 A-B */ ant_conf->fast_div_bias = 0x2; break; case 0x12: /* LNA2 LNA1 */ ant_conf->fast_div_bias = 0x3f; break; case 0x13: /* LNA2 A+B */ ant_conf->fast_div_bias = 0x2; break; case 0x20: /* LNA1 A-B */ ant_conf->fast_div_bias = 0x3; break; case 0x21: /* LNA1 LNA2 */ ant_conf->fast_div_bias = 0x3; break; case 0x23: /* LNA1 A+B */ ant_conf->fast_div_bias = 0x3; break; case 0x30: /* A+B A-B */ ant_conf->fast_div_bias = 0x1; break; case 0x31: /* A+B LNA2 */ ant_conf->fast_div_bias = 0x6; break; case 0x32: /* A+B LNA1 */ ant_conf->fast_div_bias = 0x1; break; default: break; } } } static void ath_ant_try_scan(struct ath_ant_comb *antcomb, struct ath_hw_antcomb_conf *conf, int curr_alt_set, int alt_rssi_avg, int main_rssi_avg) { switch (curr_alt_set) { case ATH_ANT_DIV_COMB_LNA2: antcomb->rssi_lna2 = alt_rssi_avg; antcomb->rssi_lna1 = main_rssi_avg; antcomb->scan = true; /* set to A+B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; break; case ATH_ANT_DIV_COMB_LNA1: antcomb->rssi_lna1 = alt_rssi_avg; antcomb->rssi_lna2 = main_rssi_avg; antcomb->scan = true; /* set to A+B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; break; case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2: antcomb->rssi_add = alt_rssi_avg; antcomb->scan = true; /* set to A-B */ conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; break; case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2: antcomb->rssi_sub = alt_rssi_avg; antcomb->scan = false; if (antcomb->rssi_lna2 > (antcomb->rssi_lna1 + conf->lna1_lna2_switch_delta)) { /* use LNA2 as main LNA */ if ((antcomb->rssi_add > antcomb->rssi_lna1) && (antcomb->rssi_add > antcomb->rssi_sub)) { /* set to A+B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; } else if (antcomb->rssi_sub > antcomb->rssi_lna1) { /* set to A-B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; } else { /* set to LNA1 */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; } } else { /* use LNA1 as main LNA */ if ((antcomb->rssi_add > antcomb->rssi_lna2) && (antcomb->rssi_add > antcomb->rssi_sub)) { /* set to A+B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; } else if (antcomb->rssi_sub > antcomb->rssi_lna2) { /* set to A-B */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; } else { /* set to LNA2 */ conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; } } break; default: break; } } static bool ath_ant_try_switch(struct ath_hw_antcomb_conf *div_ant_conf, struct ath_ant_comb *antcomb, int alt_ratio, int alt_rssi_avg, int main_rssi_avg, int curr_main_set, int curr_alt_set) { bool ret = false; if (ath_ant_div_comb_alt_check(div_ant_conf, antcomb, alt_ratio, alt_rssi_avg, main_rssi_avg)) { if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) { /* * Switch main and alt LNA. */ div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; } else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) { div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; } ret = true; } else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) && (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) { /* Set alt to another LNA. */ if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; ret = true; } return ret; } static bool ath_ant_short_scan_check(struct ath_ant_comb *antcomb) { int alt_ratio; if (!antcomb->scan || !antcomb->alt_good) return false; if (time_after(jiffies, antcomb->scan_start_time + msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR))) return true; if (antcomb->total_pkt_count == ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) { alt_ratio = ((antcomb->alt_recv_cnt * 100) / antcomb->total_pkt_count); if (alt_ratio < antcomb->ant_ratio) return true; } return false; } void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) { struct ath_hw_antcomb_conf div_ant_conf; struct ath_ant_comb *antcomb = &sc->ant_comb; int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set; int curr_main_set; int main_rssi = rs->rs_rssi_ctl[0]; int alt_rssi = rs->rs_rssi_ctl[1]; int rx_ant_conf, main_ant_conf; bool short_scan = false, ret; rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) & ATH_ANT_RX_MASK; main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) & ATH_ANT_RX_MASK; if (alt_rssi >= antcomb->low_rssi_thresh) { antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO; antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2; } else { antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO_LOW_RSSI; antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2_LOW_RSSI; } /* Record packet only when both main_rssi and alt_rssi is positive */ if (main_rssi > 0 && alt_rssi > 0) { antcomb->total_pkt_count++; antcomb->main_total_rssi += main_rssi; antcomb->alt_total_rssi += alt_rssi; if (main_ant_conf == rx_ant_conf) antcomb->main_recv_cnt++; else antcomb->alt_recv_cnt++; } if (main_ant_conf == rx_ant_conf) { ANT_STAT_INC(sc, ANT_MAIN, recv_cnt); ANT_LNA_INC(sc, ANT_MAIN, rx_ant_conf); } else { ANT_STAT_INC(sc, ANT_ALT, recv_cnt); ANT_LNA_INC(sc, ANT_ALT, rx_ant_conf); } /* Short scan check */ short_scan = ath_ant_short_scan_check(antcomb); if (((antcomb->total_pkt_count < ATH_ANT_DIV_COMB_MAX_PKTCOUNT) || rs->rs_moreaggr) && !short_scan) return; if (antcomb->total_pkt_count) { alt_ratio = ((antcomb->alt_recv_cnt * 100) / antcomb->total_pkt_count); main_rssi_avg = (antcomb->main_total_rssi / antcomb->total_pkt_count); alt_rssi_avg = (antcomb->alt_total_rssi / antcomb->total_pkt_count); } ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf); curr_alt_set = div_ant_conf.alt_lna_conf; curr_main_set = div_ant_conf.main_lna_conf; antcomb->count++; if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) { if (alt_ratio > antcomb->ant_ratio) { ath_lnaconf_alt_good_scan(antcomb, div_ant_conf, main_rssi_avg); antcomb->alt_good = true; } else { antcomb->alt_good = false; } antcomb->count = 0; antcomb->scan = true; antcomb->scan_not_start = true; } if (!antcomb->scan) { ret = ath_ant_try_switch(&div_ant_conf, antcomb, alt_ratio, alt_rssi_avg, main_rssi_avg, curr_main_set, curr_alt_set); if (ret) goto div_comb_done; } if (!antcomb->scan && (alt_rssi_avg < (main_rssi_avg + div_ant_conf.lna1_lna2_delta))) goto div_comb_done; if (!antcomb->scan_not_start) { ath_ant_try_scan(antcomb, &div_ant_conf, curr_alt_set, alt_rssi_avg, main_rssi_avg); } else { if (!antcomb->alt_good) { antcomb->scan_not_start = false; /* Set alt to another LNA */ if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) { div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA2; div_ant_conf.alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; } else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) { div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA1; div_ant_conf.alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; } goto div_comb_done; } ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf, main_rssi_avg, alt_rssi_avg, alt_ratio); antcomb->quick_scan_cnt++; } div_comb_done: ath_ant_div_conf_fast_divbias(&div_ant_conf, antcomb, alt_ratio); ath9k_hw_antdiv_comb_conf_set(sc->sc_ah, &div_ant_conf); ath9k_debug_stat_ant(sc, &div_ant_conf, main_rssi_avg, alt_rssi_avg); antcomb->scan_start_time = jiffies; antcomb->total_pkt_count = 0; antcomb->main_total_rssi = 0; antcomb->alt_total_rssi = 0; antcomb->main_recv_cnt = 0; antcomb->alt_recv_cnt = 0; } |